<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        a {
            text-decoration: none;
        }

        /*未访问状态*/
        a:link {
            color: black;
        }

        /*已访问状态*/
        a:visited {
            color: red;
        }

        /*鼠标悬浮状态*/
        a:hover {
            color: blue;
        }

        /*选中状态*/
        a:active {
            color: pink;
        }
    </style>
</head>

<body>
<a href="https://www.baidu.com/" target="_blank">百度一下</a>
<a href="学生/2021890.jpg" target="_parent">点我看美女</a>

</body>
</html>
